recipes-devtools/clang/clang/0016-clang-Append-libunwind-to-compiler-rt-for-linking.patch


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From 53ff7e84ddaf2a82733c4fcb321afa1d54e2516b Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Fri, 25 Jan 2019 14:39:04 -0800
Subject: [PATCH] clang: Append libunwind to compiler-rt for linking

Some packages which use libgcc tend to use low level unwind functions
too, and they are missing in compiler-rt but provided by llvm libunwind

Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
 clang/lib/Driver/ToolChains/CommonArgs.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/clang/lib/Driver/ToolChains/CommonArgs.cpp b/clang/lib/Driver/ToolChains/CommonArgs.cpp
index 1161e8158d5..d4c346e7960 100644
--- a/clang/lib/Driver/ToolChains/CommonArgs.cpp
+++ b/clang/lib/Driver/ToolChains/CommonArgs.cpp
@@ -1190,6 +1190,9 @@ void tools::AddRunTimeLibs(const ToolChain &TC, const Driver &D,
   switch (RLT) {
   case ToolChain::RLT_CompilerRT:
     CmdArgs.push_back(TC.getCompilerRTArgString(Args, "builtins"));
+    CmdArgs.push_back("--as-needed");
+    CmdArgs.push_back(Args.MakeArgString("-l:libgcc_eh.a"));
+    CmdArgs.push_back("--no-as-needed");
     break;
   case ToolChain::RLT_Libgcc:
     // Make sure libgcc is not used under MSVC environment by default
-- 
2.20.1